feat: initialize markr nostr bookmark client

- Add project structure with TypeScript, React, and Vite
- Implement nostr authentication using browser extension (NIP-07)
- Add NIP-51 compliant bookmark fetching and display
- Create minimal UI with login and bookmark components
- Integrate applesauce-core and applesauce-react libraries
- Add responsive styling with dark/light mode support
- Include comprehensive README with setup instructions

This is a minimal MVP for a nostr bookmark client that allows users to
view their bookmarks according to NIP-51 specification.

node_modules/micromark/lib/initialize/content.js

@@ -0,0 +1,79 @@
+/**
+ * @import {
+ *   InitialConstruct,
+ *   Initializer,
+ *   State,
+ *   TokenizeContext,
+ *   Token
+ * } from 'micromark-util-types'
+ */
+
+import { factorySpace } from 'micromark-factory-space';
+import { markdownLineEnding } from 'micromark-util-character';
+/** @type {InitialConstruct} */
+export const content = {
+  tokenize: initializeContent
+};
+
+/**
+ * @this {TokenizeContext}
+ *   Context.
+ * @type {Initializer}
+ *   Content.
+ */
+function initializeContent(effects) {
+  const contentStart = effects.attempt(this.parser.constructs.contentInitial, afterContentStartConstruct, paragraphInitial);
+  /** @type {Token} */
+  let previous;
+  return contentStart;
+
+  /** @type {State} */
+  function afterContentStartConstruct(code) {
+    if (code === null) {
+      effects.consume(code);
+      return;
+    }
+    effects.enter("lineEnding");
+    effects.consume(code);
+    effects.exit("lineEnding");
+    return factorySpace(effects, contentStart, "linePrefix");
+  }
+
+  /** @type {State} */
+  function paragraphInitial(code) {
+    effects.enter("paragraph");
+    return lineStart(code);
+  }
+
+  /** @type {State} */
+  function lineStart(code) {
+    const token = effects.enter("chunkText", {
+      contentType: "text",
+      previous
+    });
+    if (previous) {
+      previous.next = token;
+    }
+    previous = token;
+    return data(code);
+  }
+
+  /** @type {State} */
+  function data(code) {
+    if (code === null) {
+      effects.exit("chunkText");
+      effects.exit("paragraph");
+      effects.consume(code);
+      return;
+    }
+    if (markdownLineEnding(code)) {
+      effects.consume(code);
+      effects.exit("chunkText");
+      return lineStart;
+    }
+
+    // Data.
+    effects.consume(code);
+    return data;
+  }
+}